854 research outputs found
FOOD AND NUTRITION PROGRAMS IN THE NEXT FARM BILL
Policy, Food, Nutrition, Costs, Benefits, Agricultural and Food Policy, Food Consumption/Nutrition/Food Safety, Q10, Q13, Q18,
TRADE POLICY DEVELOPMENTS AFFECTING COTTON
Crop Production/Industries, International Relations/Trade,
Composition and seasonality of planktonic rotifers in limnetic and littoral regions of a floodplain lake (Parana river system)
El Tigre est un lac peu profond entouré de macrophytes. En période des eaux hautes du Parana, il est relié à la riviÚre Correntoso. La structure du peuplement en rotifÚres a été analysée au cours d'une année dans la zone centrale du lac, et dans les diverses espÚces de macrophytes littoraux. Les différentes zones sont décrites. La zone centrale était caractérisée par la prédominace des genres #Keratella, #Filinia, et #Polyartha, et par une faible richesse spécifique. Dans les peuplements littoraux, la richesse spécifique était plus élevée, avec dominance des genres #Lecane, #Lepadella, #Trichocerca, et #Testudinella$. Les variations saisonniÚres de la richesse, de la diversité et des abondances sont semblables pour les deux zones, avec une amplitude moins prononcée dans la zone littorale. Les facteurs hydrologiques sont la principale cause des variations saisonniÚres, mais d'autres facteurs peuvent aussi intervenir. (Résumé d'auteur
QUALITY RESTRICTIONS AS BARRIERS TO TRADE: THE CASE OF EUROPEAN COMMUNITY REGULATIONS ON THE USE OF HORMONES
Sanitary regulations, product definitions, grades, production or processing regulations, and other qualitative standards are generally applied to both domestic production and imported goods. These quality restrictions can be seen as trade barriers, although it is often difficult to determine whether a given restriction is based on legitimate health or safety concerns or is simply an alternative device for protecting producers. The purpose of this paper is to evaluate the welfare effects of a recent quality regulation, the European Community ban on the use of hormones in livestock production. A conceptual framework is developed to analyze the effects of the ban on the market for edible offals. The results indicate that Community prices for edible offals will increase 34% to 45%, while the world price will fall by at least 35%.Food Consumption/Nutrition/Food Safety, International Relations/Trade,
ECONOMIC ANALYSIS IN DISPUTES OVER TRADE REMEDY AND RELATED MEASURES IN AGRICULTURE, WITH EXAMPLES FROM RECENT CASES
International Relations/Trade,
Hidden AGNs in Early-Type Galaxies
We present a stacking analysis of the complete sample of Early Type Galaxies
(ETGs) in the \textit{Chandra} COSMOS (C-COSMOS) survey, to explore the nature
of the X-ray luminosity in the redshift and stellar luminosity ranges
and {10}^{9}. Using established
scaling relations, we subtract the contribution of X-ray binary populations, to
estimate the combined emission of hot ISM and AGN. To discriminate between the
relative importance of these two components, we (1) compare our results with
the relation observed in the local universe for
hot gaseous halos emission in ETGs, and (2) evaluate the spectral signature of
each stacked bin. We find two regimes where the non-stellar X-ray emission is
hard, consisten t with AGN emission. First, there is evidence of hard, absorbed
X-ray emission in stacked bins including relatively high z () ETGs
with average high X-ray luminosity (L_{X-LMXB}\gtrsim 6\times{10}^{42}\mbox{
erg}/\mbox{s}). These luminosities are consistent with the presence ofhighly
absorbed "hidden" AGNs in these ETGs, which are not visible in their optical-IR
spectra and spectral energy distributions. Second, confirming the early
indication from our C-COSMOS study of X-ray detected ETGs, we find
significantly enhanced X-ray luminoaity in lower stellar mass ETGs
(L_K\lesssim{10}^{11}L_{\astrosun}), relative to the local
relation. The stacked spectra of these ETGs also
suggest X-ray emission harder than expected from gaseous hot halos. This
emission is consistent with inefficient accretion
onto M_{BH}\sim
{10}^{6}-{10}^{8}\,M_{\astrosun}.Comment: 22 pages, 7 figures, 2 tables. Accepted for publications on Ap
Regional Trade Agreements and Implications for US Agriculture: The Case of CAFTA-DR
International Relations/Trade,
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